It is possible that the main title of the report Marfan Syndrome is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
As Jenny points out, being able to lisp the alphabet song at age two has little to do with 'knowing' the alphabet. And, yes, most children learn the letters by sight and sound in kindergarten, although most are capable of learning this information sooner if diligently taught by parents or others.
By 18 months, your toddler may be speaking only a few words â five is typical â but he'll understand about 50. And he'll be able to understand and begin to follow your directions even if they involve two separate actions.5 to 30 months. Between ages 2 and 3, your child develops a pretty good understanding of language. Development experts say most 2-year-olds understand at least 200 to 300 words and add as many as 10 new ones to their vocabulary every day.